/Engine/Source/Runtime/Engine/Public/Animation/AnimNodeData.h
Get the specified mutable data for the specified instance. The data may or may not reside on an anim instance itself as it may have been folded into constants. Only available in editor to support patching constant data during compilation. Not for use at runtime.
void * GetMutableData ( [UE::Anim::FNodeDataId](API\Runtime\Engine\Animation\FNodeDataId) InId, [FAnimNode_Base](API\Runtime\Engine\Animation\FAnimNode_Base) * InNode, [UObject](API\Runtime\CoreUObject\UObject\UObject) * InCurrentObject ) const